Inside the Earth

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Inside the Earth
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The Composition of Earth

• The Earth is divided into three layers
• The crust, mantle, and the core based on what
  each one is made up of.
• The lightest materials make up the outer layer,
  the densest materials make up the inner layers.

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Composition (What it is made of)

• Crust
• Mantle
• Outer
• Core
• Inner Core

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The Crust

• Outer layer
• 5-100 km thick
• 2 types of crust
• Oceanic Composed of basalt (rock)
• Continental composed of granite (rock)

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Oceanic vs. Continental Crust

• Composition basalt (rock)
• 5-10 km thick
• Temperature water temperature to 870C
• Composed of Basalt

• Composition granite (Rock)
• average thickness of 40 km.
• Temperature air temperature to 870C
• Composed of Granite

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Oceanic and Continental Crust
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Calculating Density

• Density Mass / Volume

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The Mantle

• Composed of mostly of iron and magnesium
• Thickness 1800-2900 km thick
• State of matter upper mantle is solid, lower
  mantle is liquid
• Temp 870-3700C
• Density more dense than the crust

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The Mantle

• It is made up mostly of iron and magnesium, which
  is very dense. The mantle acts like silly putty
  or laffy taffy.
• The density ranges from 3.4-4.4 g/cm3
• Temperature870-3700C
• Lots of Pressure!

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The Outer Core

• It is composed of liquid iron and nickel, which
  causes Earths magnetic field.
• It is 2,270 km thick
• It is a liquid
• Temp Up to 6,000C
• Densitymore dense than the mantle

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Inner Core

• Composed of iron and nickel
• 1216 kilometers thick
• Solid (Due to Pressure)
• Temperature6,000-7200C Hotter than the Sun!!
• Density most dense layer of them all

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Earths Layers

• How are the earths layers similar to an egg?
• Shellcrust
• Egg whitemantle
• Yolkcore

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Do you Remember?

• 1. What is the difference between continental
  and oceanic crust?
• 2. Which layer is the hottest?
• 3. Arrange Earths layers from hottest to
  coolest.
• 4. What layer is the least dense?
• 5. A drilling rig can dig down 6 kilometers.
  What layer of Earth would you more than likely be
  in?

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Physical Structure of the Earth(5 Layers)

• Lithosphere- crust and rigid outer layer of
  mantle (upper mantle)
• Asthenosphere- solid rock that flows slowly (like
  hot asphalt, apart of mantle)
• Mesosphere-The strong, lower part of the mantle.
  
• Outer Core- liquid layer
• Inner Core- solid, very dense

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Tectonic Plates

• Earths crust is broken into about 19 pieces
• These plates move on top of the asthenosphere